Integrated control, diagnosis and reconfiguration of a heat exchanger

Ballé, Peter; Fischer, Martin; Füssel, Dominik; Isermann, Rolf

doi:10.1109/acc.1997.609661

Cited by 22 publications

(26 citation statements)

References 11 publications

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“…The former used the HJ pattern search to optimise the design parameters of a controller for an electric engine, the latter to find the optimal power production for a given grid system. HJ has also been used to optimise the parameters for a controller of a heat exchanger [4]. In many cases, the HJ algorithm is used to supplant a linear program.…”

Section: Eo With Hooke-jeeves Pattern Searchmentioning

confidence: 99%

Dynamic function optimisation with hybridised extremal dynamics

Moser

Chiong

2009

Memetic Comp.

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Dynamic function optimisation is an important research area because many real-world problems are inherently dynamic in nature. Over the years, a wide variety of algorithms have been proposed to solve dynamic optimisation problems, and many of these algorithms have used the Moving Peaks (MP) benchmark to test their own capabilities against other approaches. This paper presents a detailed account of our hybridised Extremal Optimisation (EO) approach that has achieved hitherto unsurpassed results on the three standardised scenarios of the MP problem. Several different components are used in the hybrid EO, and it has been shown that a large proportion of the quality of its outstanding performance is due to the local search component. In this paper, the behaviour of the local search algorithms used is analysed, and the roles of other components are discussed. In the concluding remarks, the generalisation ability of this method and its wider applicability are highlighted.

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Section: Eo With Hooke-jeeves Pattern Searchmentioning

confidence: 99%

Dynamic function optimisation with hybridised extremal dynamics

Moser

Chiong

2009

Memetic Comp.

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“…In [304], it has been shown how a combined module for control and diagnosis can be designed, such that references are tracked, disturbances are robustly rejected, undetected faults do not have disastrous effects, the number of false alarms are reduced and the faults which have occurred are identified. Demonstrations of the applicability of this approach to valve fault accommodation on rocket engines, heat exchangers and autonomous underwater vehicles have been provided in [138], [21] and [153], respectively.…”

Section: Integrated Diagnostics and Control (Idc)mentioning

confidence: 99%

Advances in Gain-Scheduling and Fault Tolerant Control Techniques

Rotondo¹

2018

Springer Theses

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This thesis presents some contributions to the state-of-the-art of the fields of gainscheduling and fault tolerant control (FTC).In the area of gain-scheduling, the connections between the linear parameter varying (LPV) and Takagi-Sugeno (TS) paradigms are analyzed, showing that the methods for the automated generation of models by nonlinear embedding and by sector nonlinearity, developed for one class of systems, can be easily extended to deal with the other class. Then, two measures, based on the notions of overboundedness and region of attraction estimates, are proposed in order to compare different models and choose which one can be considered the best one. Later, the problem of designing state-feedback controllers for LPV systems has been considered, providing two main contributions. First, robust LPV controllers that can guarantee some desired performances when applied to uncertain LPV systems are designed, by using a double-layer polytopic description that takes into account both the variability due to the varying parameter vector and the uncertainty. Then, the idea of designing the controller in such a way that the required performances are scheduled by the varying parameters is explored, which provides an elegant way to vary online the behavior of the closed-loop system. In both cases, the problem reduces to finding a solution to a finite number of linear matrix inequalities (LMIs), which can be done efficiently using the available solvers.In the area of fault tolerant control, the thesis first shows that the aforementioned double-layer polytopic framework can be used for FTC, in such a way that different strategies (passive, active and hybrid) are obtained depending on the amount of available information. Later, an FTC strategy for LPV systems that involves a reconfigured reference model and virtual actuators is developed. It is shown that by including the saturations in the reference model equations, it is possible to design a model reference FTC system that automatically retunes the reference states whenever the system is affected by saturation nonlinearities. In this way, a graceful performance degradation in presence of actuator saturations is incorporated in an elegant way. Finally, the problem of FTC of unstable LPV systems subject to actuator saturations is considered. In this case, the design of the virtual actuator is performed in such a way that the convergence of the state trajectory to zero is assured despite the saturations and the appearance of faults. Also, it is shown that it is possible to obtain some guarantees about the tolerated delay between the fault occurrence and its isolation, and that the nominal controller can be designed so as to maximize the tolerated delay.i Resum Aquesta tesi presenta diverses contribucions a l'estat de l'art del control per planificació del guany i del control tolerant a fallades (FTC).Pel que fa al control per planificació del guany, s'analitzen les connexions entre els paradigmes dels sistemes lineals a paràmetres variants en el temps (LPV) i d...

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“…Heat exchangers are the subject under discussion in this paper which deals especially with the diagnosis and implementation issues. An interested reader is also referred to (Balle´, Fischer, Fu¨ssel, Nelles, & Isermann, 1998).…”

Section: Introductionmentioning

confidence: 99%

Real-time implementation of fault diagnosis to a heat exchanger

Persin

Tovornik²

2005

Control Engineering Practice

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The detection and isolation of faults in engineering systems has lately become of great significance. This paper is concerned with application of analytical fault detection techniques to a heat exchanger. The system is nonlinear and a velocity-based linearization is proposed before the residual generation, which is then realized using an observer, and parity relations. The problem of reasoning is treated by an approximate reasoning approach, called the transferable belief model. Its important feature is the ability to treat inconsistency in data by using more general belief functions. The system under consideration is controlled by programmable logic controller and supervised by supervisory control and data acquisition system. The procedure for implementation is designed with particular emphasis on industrial practice and the Ole for process control data access client/server technology is used for communication between sub-systems. r

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Integrated control, diagnosis and reconfiguration of a heat exchanger

Cited by 22 publications

References 11 publications

Dynamic function optimisation with hybridised extremal dynamics

Dynamic function optimisation with hybridised extremal dynamics

Advances in Gain-Scheduling and Fault Tolerant Control Techniques

Real-time implementation of fault diagnosis to a heat exchanger

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